Mining-machine.



A. U. DAVIS.

MINING MACHINE.

APPLICATION FILED JULY 27, 1909 Patented Nov. 1,1910.

add/KM ZZZ? 61.96615 A U. DAVIS.

MINING MACHINE.

APPLIOATION FILED JULY 27, 1909.

9%,645. Patented Nov. 1,1910.

3 BHEETBSHEET 2.

A; U. DAVIS. MINING MACHINE. APPLICATION FILED JULY 27, 1909,

974,645. Patented Nov. 1,1910.

3 SHEETS-SHEET 3.

\ to loosen or remove the substance and also yide a mining machine with a cutteryof the,

justablesupport for the cutter also enabling ting operation progresses, as well as to position the cutter both horizontally and ver- .fslsts in certain improvements, and combina ,tio ns and arrangements of parts, all as will citizen of the United States, residing at usefpl 3 Improvements in Mining-Machines, gt wliich the following is a specification.

novelfeatures being pointed out particularly in thezclaims at the end of the specification. In the accompanying drawing :Figure 1 =chine. constructed in accordance with the Shown in Fig. 1; Fig. 3 is an end elevation Mann rt.

ALFRED p; Davis, on LUTHERVILLE, MARYLAND.

mums-Macrame.

To all whom it may concern I Be it'known that I, ALFRED U. DAVIS, a

Lutherville, in the county of Baltimore and Statg of Maryland, have invented new and l I y present invention relates to improve ments in cutting apparatus and more particularly' to the class adapted for use in. mining operations, and it has for its object primarily to provide a machine of this class aving a cutter of an improved type whereby the substance to be mined may be re- .mcoyed in the form of a core or pillar, thus avoiding the necessity of blasting in order" obviating. .the objections incident to the handling of ores or substances when reduced to comparatively small lumps as is common to the modes of minin as heretofore practiced.

Another objectoI the invention is to proclass just described and also with novel means for supporting. the cutter whereby the same may be adjusted so asto enter the wall gr ,vein and cut its. way through it, the ad- 1t to swing in an annular path about the car or sup ort whereby the cutter may operate efiicienly at either or both sides of the car or support. v

F urtherobjects of the invention are. to provide a mining machine of the class described with simple and improved adjusting devices whereby the cutter may be conveniently adjusted so as to feed it as the cuttically.

. Tothese and other ends, the invention conbe hereinafter more fully described, the

isa plan view of a mining or cutting m'apresent invention, the position of the cutter with reference to the ore or substance to be mined. being shown diagrammatically; Fig. 2 is'a side elevation of the apparatus as of, the apparatus as viewed from the right in Fig. 1, this view being shown partially in Specification ofl: Iietters Patent. Application filed July 27,1909. Serial No. 509,762.

Patented ov. it, 1918.

Fig. 4 is a detail sectional view showing the adjusting means for varying the elevation of the cutter as well as for feeding it longitudinally of the car or Support on which it is mounted Fig. 5 is a detail sectional view reference characters in the several views.

5 section so as-to illustrate the gearing between the motor and the revoluble cutter;

In the accompanying drawing, "I have shown one embodiment of the invention as an example. It will be understood, however, that the invention is not limited to the recise construction shown, as certain modifications and changes may be made therein in order to adapt the invention to thebest advantage in each. particular ,case. In the present instance, the machine embodies a suitable support which is'preferably portable in order to permit the cutter to be readily moved from place to place. A car l is shown in the present instance which is provided with wheels'whereby it may travel upon rails such as are commonly employed in mines. In order to enable the car to be rigidly held fromimoveme nt during the operation of the cutter, the car may be pro- .vided with suitable devices which. are capable of obtaining a firm hold upon the walls and roof of the passageway. In the present instance, a pair of sprags 2 are pivotally attached to hooks or eyes 3 fastened to the opposite sides of the car, these sprags being preferably pointed whereby they may obtain aiirm holdagainst the'side walls of the passage, the sprags when not in use being capable of folding against the respective sides ofthe cars, they'being supported by the hooks or eyes. At each end of the car there may also be provided a jack which in the instance shown consists of a yoke l hav ing its ends pivotally attached to the car bymeans of a pair of pivot lugs 5, and ascrew 6 is connected to the yoke and pro vided with a hand-wheel 7 whereby the end of the screw may be caused to jam against the ceiling or any other convenient part of the mine and thus firmly hold the car in proper position, the jack in Fig. 2 being shown as engaging the roof of the mine passage so as to firmly hold the car down upon the rails.

, According to the present inveption, a cutter is provided which is capable of entering the ore or other substance and cutting its way into the same in such a manner as to remove a core or pillar which may be broken off in convenient lengt as the cutter advances. In the present instance, this cutter comprises a revoluble ring 8 of a suitable size one face of which is provided with a suitable number of sharpened teeth 9. This ring is rigid in the sense that it is so constructed that it has an inherent ower to maintain a true circular form w ereby it may effectually sustain strain imposed upon the cutters and it will fit truly within its supporting housing which will be heronafter described, the ring being distinguished by the term rigid from such known machines inwhich cutters are carried by flexible chains. These teeth may be set in the ring in any appropriate manner, althou h it is generally preferable to removab y mount them in order that they may be re-' moved and sharpened or renewed, the ring in the present instance being provided on one of its faces with recesses 10 into which the ends or shanks of the teeth are insertedat the proper angle, and a set-screw 11 is provided for locking each tooth firmly in position. These teeth are also set in the ring so as to provide SllfilClGIlt clearance for the cutter as it advances, the teeth in the present instance being shown as arranged in staggered relation, the two extreme rows of teeth being set in circles, the inner circle being less than the diameter of the bore through the ring while the outer circle is of a size greater than the external diameter of the ring and its housing whereby the ring and its housing may pass freely through the cut made by the cutter. These teeth, it is to be observed, extend in a direction approximately axially of the ring whereby they may cut away the material while the ring is advanced by an axial movement.

As the material is to be removed as a core or pillar, it is necessaryithat the center of the ring should be unobstructed :to accommodate the core. For this purpose the ring in the present instance is both supported and driven from its periphery or circumference, an annular housing 12 being provided which is rigidly supported by an arm 13, and: the cutter ring is revolubly mounted with reference to the housing preferably by an annular row of balls 14 whichl-travel in raceways formed in the housing and ring,

respectively. In order to prevent the entrance of dust or chippings'to the bearing thus rovided between the ring and housing, list-excluding packing rings 15 and 16 may be interposed between these parts. I

In order to revolve the cutter rin this ring in the present instance is provi ed on its circumference with gear teeth 17 with which a gear 18 meshes, this gearbeing, carried by a shaft 19 which may be journaled in the supporting arm 13, and the shaft 19 in turn is provided with a worm wheel 20 to engage a worm 91 carried by a drivin shaft 22. Either or both of the'gears'18 an 20 may be housed in order 'to protect them from wear, a cover plate 23 being shown in the present instance to rotect the gear wheel 18 and the gear-teeti on the cutter ring. Any suitable means may be employed for operating the shaft 22 to drive the cutter, a motor 24 being shown in the present. instance which is preferably mounted on and' movable with the arm 13, the motor being connected to the shaft 22 by suitable gearing 25. By mounting the mot-or 24 on the same arm 13 which su ports thccutter, i these arts are maintained in proper driving re ation, irrespective of the," various adjustments of the cutter;

In order to ermit the cutter to be revolved so as to rin 'it into action, the arm 13 which supports the cutter is mounted on a turn-table 26, the turntable being revolubly supported on a carriage 27, and this carriage is slidably supported on the transverse rails 28'of .a second .carria e 29, the carriage 29 being shiftablelongitudinally of the car.

In order to revolve the turn-table so as to turnthe cutter, the turn-table is provided with an upwardly extending shaft 30 which carries a worm 31, and this worm m eshes with a worm wheel 32 formed on the transversely shiftablecarriage 27, the upper end of the shaft 30 being shaped toreceive a crank or wheel whereby it may be revolved conveniently In order to vary theelevation' of the cutter, the arm 13 which carries the cutter is pivotally connected to the turn-table at 33 whereby the cutter may swing in a vertical plane. Any suitable means may be provided for elevating or depressing the cutter. and for retaining it in the different adjusted positions. In the present instance, a screw 120 34 is carried by the arm 13, and its lower end is provided with a head which cooperates with a slotted bracket 35 formed on the turn-table, a turning of this screw in the appropriate direction serving to elevate or depress the cutter and to retain it in the adjusted position. The upper end of the screw 34 may also be shaped toreceive a crank or wheel whereby it may be conveniently o erated. A guide 36 is also preferably attac ed they present instance isshiftedby means of a drum 38, this drum being fixed to a shaft Y 39 which 'is journaled in a hub 40 which 1s carried by the transversely shiftable car riage 27, the upper end of this shaft being preferably shaped to receive an operating crank or Wheel. Around the drum 38 is wound or convoluted a cable-41, the opposite ends of the cable being secured to the opposite sides of the longitudinally shiftable riage' 29. In order to maintain the cable at the proper tension, a screw 42 may be pro- 'vided whereby any slack that may develop and the frame may be supported in-the cable canbe taken up. The intermediate part of this cable may pass through an opening in the drum, thereby avoiding the necessity of cutting the cable. By turning the shaft 39 in the appropriate direction, the drum will act to wind one end of the cable and unwind the opposite end, andas both ends of the cable are secured, the result will be that the carriage 27if'will beshifted in a direction transversely of the car, producing a horizontal or lateral adjustment of the cutter ring. A similar means ma be provided for adjustin direction longitudinal y of the car. In the present'instance,-I have shown a drum 43 which is fixed to the lower end of a shaft 4A which may also be journaled in the hub 40 and the upper end of this shaft may be shaped to receive an, operating own or wheel. A cable .45 is Wound upon the drum 43, its intermediate portion preferably passing thraugh a transverse opening in the drum, and the opposite ends of the cable 45 are fixed to the ends of a'frame 46, an adjusting screw 47 being preferably provided for removing the slack from this cable. The frame 46 is designedto shift transversely of the car simultaneously with the transverse shifting of'the turn-table and its carriage 27, a suitable number of arms 48 dependin from the transversely movable carriage 2% so as to effect this movement of the frame, or guided in any suitable manner, axles 49for the car wheels passing through the frame in the present instance and serving to' guide or support it.

n practice, the motor operates through its gearing ,to revolve the cutter ring and as this ring is advanced to the ore by an axial movement, the teeth whichproject from the face of thering in an approximately axial cari vertically closed and revolu the ring the carriage 29 m a direction operate upon the ore or substance so as to cut an annular groove Wl'ilCll 1s of sufficient dimensions to provide the neccs I sary clearance for the ring and its housing and leaving a central uncut portion of the '70 ore or substance as a core or pillar which projects through the central opening of the ring and may be broken off in lengths convenient for handling. As the cutter is su ported on the turn-table, it may be readii turned or swung so that it may enter a wall of the mine passage, and after cutting through the same for it may be removed by a swinging or turning movement it being, prepare the ore or substance preliminarily for the reception of the cutter. The turntable also permits the cutter to be revolved therefore, unnecessary to a suflicient distance, I

completely around the car so that the maxi mum amount of material may be removed for each given position of the car. The longitudinal adjustment of the turn-table upon the car also enables the cutter to be advanced position of the car,

Without changing'the and the cutter may also be adjusted either or horizontally with facility; I claim as my invention 1. A port, a rigid annular housingmountedon said support, a ring having its periphery in- Ie within such housing,

mining machine comprising a -supthe ring having an unobstructed-central corereceiving cutting devices carriedby a lateral face of cause a clearance for the ring and housing,

j means supported by the housing support and 1 cooperative with the inclosed periphery of the ring forrevolving the latter, and means for feeding the housin direction of the axis 0 the latter.

'2. A mining machine comprising a. support, a rigid annular housing mounted thereon, a rigid ring having its outer circumference inclosed and journaled within said housing, provided with a gear face which is inclosed within the housing, cutting teeth ing from one face of the ring in a'direction approximatelyaxially thereof and arranged to form a clearance for the housing and ring driving mechanismbarried by saidsupport and coiiperative with the gear face pn the inclosed ring for revolving tendingtherethrough, cutters fixed to one opening extending therethrough,

and occupying an area sufiicient to and the ring inthe v the periphery of the ring being also projectas such parts are fed in anaxial direction,

face of the ring and operative to cut away material to form a clearance for the hous,

ing and rin driving means carried by the housing an coiiperative with said ring to revolve the latter, means for turning the arm and housing about the axis of the tumtable as a center, and means for feedin the housin and ring in the direction 0 the axis 0 the latter.

4. A mining machine comprising a support, a turn-table mounted thereon, an arm projecting radially from theturn-table and turnable about the axis of the latter as a center, a motor supported on said arm, a rigid annular housing fixed to the outer end of said arm, a ri id ring having itsouter circumference indlosed by and journaled within said housing, cutting teeth on one side of said ring and arranged to form a clearance for the housing and ring when the latter is fed in an axial direction, driving means carried'by the housing and cooperative with the periphery of said ring for revolving the latter, said driving means being operatively connected to said motor,

means for rotating the turntable to alter the angle of said arm and housing, and means for feeding the housin and ring in the direction of the/axis of t e latter.

5. A miningor cutting machine comprising a support a turn-table thereon, a vertically movable arm carried by the turntable, a revoluble .ring carried by said arm and having an unobstructed core-receiving opening extending therethrough, cutting devlces projecting from a face of said ring and operative during an axial feed movement of the ring, means for rotating the ring, a housing supporting said ring solely by its periphery, and means connected to the support for feeding the housing and the ring in the direction of the axis of the ring.

6. A minin machine comprising a support, a turn-ta 1e mounted thereon and turnable about a vertical axis, an arm turnable with said table and pivoted thereon to move in a vertical plane, a revoluble ring carried by said arm, means for revolving said ring, means connected to 'said support for feeding the arm and ring in the direction of the axis of the ring, and cutting devices arranged on one face of said ring and operative to remove the material While the ring is fed in an axial direction.

7. A mining machine comprising a support, an arm pivotally mounted thereon, a motor momited on and movable with said arm, a rcvolnble ring carried by said arm, having an unobstructed core-receiving opening extending therethrough, cutting devices arranged at one face of said ring and operative to remove material as said ring is revolvcd and advanced in a substantially axial direction. a housing supporting said ring solely at its periphery, a driving connection port, a carriage shiftable thereon, a second carria'e carried by the-- table having an annular mounted on the second carriage, a cutter carbetween the motor and ring andim eans for feeding'said arm and ring in the direction of the axis of said ring.

8. A mining machinecom irising (pinsu ongitu y first carriage and shiftab e thereon ina direction transversely of the support, a turntable carried by said second carriage, a cutter mounted on and movable with the turntable, means carried by saidsecond carriage for adjusting the first-mentioned carriage longitudinally of said su port, and means also carried by said second carriage for adjust-ing the latter transversely of said support.

9. A mining machine comprising a support, a carriage shiftable longitudinally of the support, a second carriage carrie by the first carriage and shiftable thereon in a direction transversely of the support, a turn-. ortion revolubly ried by and movable with the turn-table, means carried by sai second carriage and arranged within the annular portion of the turn-table for adjusting the first-mentioned carriage longitudinally of said support, and means also carried by said secon carriage for adjusting the latter transversely of sald support i 10. A mining machine comprising a car, a carriage shiftable lon itudinally thereon, a second carriage shifta le on the longitudinally movable carriage in a direction transversely of the car, a turn-table having an v annular portion revolubly mounted on the second carriage, an arm turnable with said table and pivoted thereto to swing in a vertical plane, a cutter carried by said arm, a driving motor also mounted on said am, means mounted on said second carriage and arranged to turn within the annular portion of the turntable for adjusting the first-mentioned carriage in a direction longitudinally of the car, means also carried by said second carriage for ad usting the latter transversely of the car .':and means carried by the turntable for adjusting the elevation of the cutter carrying arm.

11. A mining machine comprising a sup- 1 port, a carriage shiftable ongitudinal thereon, a second carriage earned carriage first mentioned and shiftable thereon in a direction transversely of the support, a rotatable drum connected to each carriage, a cable cooperative with each drum and operative to shift the carriages in their respcctive paths, and a cutter. mounted on and. movable with one of said carriages. I v '12. In a mining machine, the combination of a support, a ca rriage shiftable longitudinally with respect to said support, a turnvertically adjustable arm mounted on said by the a table mounted to revolve onsaid carriage, a I

turn-table, means. can-lied by the turn-table I In testimony whereof I have hereunllo set for rotatmg 1t, means behVeenthe turni my hand -1n presence of two subscnbmg table and said arm for Adjusting the elevawitnesses.

tion of 'the latter, an annular cutter ring ALFRED U. DAVIb supported by saidarm, and operating means Witnesses: carried by said arm for revolving the cutter HERBERT DAVIS,

ring. LUTHER M. LONGSHEW. 

